On Tue, 15 Dec 2009 10:15:32 -0700 Jason Gunthorpe <jguntho...@obsidianresearch.com> wrote:
> > > However, I don't understand the comment "Only set HopLimit if going > > > through a > > > router"? > > > > This is from '#ifdef ROUTER_EXP' days - as far as I could understand > > HopLimit should be set to IB_HOPLIMIT_MAX for inter-subnet MADs. > > If HopLimit is 0 then no GRH is required, if it is non 0 then the user > of that path needs to apply a GRH. IIRC there are already a few things > in the kernel that follow this? Is that in the spec somewhere? The follow on would be that if they specify a DGID in the PathRecord query and the result is subnet local they must still use a GRH even if the packet is going to stay local? I think this makes sense but I wonder if __everyone__ is following that? Ira > > Jason -- Ira Weiny Math Programmer/Computer Scientist Lawrence Livermore National Lab 925-423-8008 wei...@llnl.gov -- To unsubscribe from this list: send the line "unsubscribe linux-rdma" in the body of a message to majord...@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html
